In the oasis complex, the thirsty man images he sees water, palm trees, and shade not because he has evidence for the belief, but because he has a need for it. Desperate needs bring about a hallucination of their solution: thirst hallucinates water, the need for love hallucinates a prince or princess. The oasis complex is never a complete delusion: the man in the desert does see something on the horizon. It is just that the palms have withered, the well is dry, and the place is infected with locusts.
Love was as subtly caught, as a disease; But being got it is a treasure sweet, which to defend is harder than to get: And ought not be profaned on either part, for though 'Tis got by chance, 'Tis kept by art.
It is true from early habit, one must make love mechanically as one swims; I was once very fond of both, but now as I never swim unless I tumble into the water, I don't make love till almost obliged.